io: Remove interrupt circuitry (it doesn't belong there anyway)

src/memory/io.rs

@@ -195,49 +195,3 @@ pub trait BusAux: BusIO {
         self.read_arr(0x14e).ok().map(u16::from_be_bytes)
     }
 }
-
-pub mod interrupt {
-    use super::BusIO;
-    use bitfield_struct::bitfield;
-
-    /// Interrupt Enable register
-    const IE: usize = 0xffff;
-    /// Interrupt Flags register
-    const IF: usize = 0xff0f;
-
-    #[bitfield(u8)]
-    #[derive(PartialEq, Eq)]
-    pub struct Interrupt {
-        vblank: bool,
-        lcd: bool,
-        timer: bool,
-        serial: bool,
-        joypad: bool,
-        #[bits(3)]
-        _reserved: (),
-    }
-
-    impl<B: BusIO> Interrupts for B {}
-    /// Functionality for working with [Interrupt]s
-    pub trait Interrupts: BusIO {
-        /// Gets the set of enabled [Interrupt]s
-        fn enabled(&self) -> Option<Interrupt> {
-            self.read(IE).map(Interrupt::from_bits)
-        }
-        /// Gets the set of raised [Interrupt]s
-        #[inline]
-        fn raised(&self) -> Option<Interrupt> {
-            self.read(IF).map(Interrupt::from_bits)
-        }
-        /// Raises [Interrupt]s with the provided mask.
-        fn raise(&mut self, int: Interrupt) {
-            let flags = self.raised().unwrap_or_default();
-            let _ = self.write(IF, flags.into_bits() | int.into_bits());
-        }
-        /// Clears [Interrupt]s with the provided mask.
-        fn clear(&mut self, int: Interrupt) {
-            let flags = self.raised().unwrap_or_default();
-            let _ = self.write(IF, flags.into_bits() & !int.into_bits());
-        }
-    }
-}